Abstract: A method for conducting a surgical procedure is described herein. The surgical procedure includes creating a pathway through a nasal cavity, creating an opening through a section of skull that is connected to the nasal cavity, harvesting a portion of the skull formed by creating the opening to expose a dura layer of the brain, cutting a section of the dura layer to expose a section of brain tissue, and inserting a tissue resection device through the nasal cavity to take tissue samples from the exposed brain tissue. The dura layer is then secured over the exposed brain tissue so as to create a watertight seal and the previously harvested portion of the skull is inserted in in the opening and secured to the skull to close the opening.

Abstract: A surgical system is provided that includes a device body that has a working channel providing a pathway for an instrument, an extension adjuster engaged with the device body, the extension adjuster also including a stop. The stop is disposed a predetermined distance from the working channel such that the stop and the distal end of the working channel cooperate to define an effective working channel length. The instrument may be inserted through the working channel and protrude outwardly from the distal end of the working channel. The extent of the protrusion is limited by the effective working channel length whereby the stop prevents further insertion of the instrument.